CN215956364U - Touch circuit, touch device and touch equipment - Google Patents
Touch circuit, touch device and touch equipment Download PDFInfo
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- CN215956364U CN215956364U CN202121204113.5U CN202121204113U CN215956364U CN 215956364 U CN215956364 U CN 215956364U CN 202121204113 U CN202121204113 U CN 202121204113U CN 215956364 U CN215956364 U CN 215956364U
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Abstract
The application discloses touch control circuit, touch device and touch equipment, when there is interference signal in the environment at touch detection module place, receive this interference signal and according to this interference signal output control signal to feedback module through signal reception module, feedback module exports the clamp signal to touch detection module when the input control signal, so that touch detection module stops output key signal when the input clamp signal, thereby realize when there is interference signal in the environment at touch detection module place, touch detection module can not export key signal because of receiving interference signal's influence, thereby the probability that touch control circuit was triggered by the mistake has been reduced.
Description
Technical Field
The application belongs to the technical field of touch control, and particularly relates to a touch circuit, a touch device and touch equipment.
Background
In a conventional capacitive touch key, generally, a capacitance value of a key electrode connected to an Integrated Circuit Chip (IC Chip) is detected to determine whether the key is pressed, and a key signal is output when the key is pressed. However, when an electromagnetic interference signal (e.g., an interference signal caused by a tesla coil) acts on the key electrode, the capacitance of the key electrode may change, which may cause the IC chip to erroneously determine that the key is pressed by a finger, and thus, the IC chip may erroneously output the key signal.
SUMMERY OF THE UTILITY MODEL
An object of the present application is to provide a touch circuit, which aims to solve the problem that the conventional touch circuit erroneously outputs a key signal due to electromagnetic interference.
A first aspect of an embodiment of the present application provides a touch circuit, including:
the touch detection module is configured to stop outputting the key signal when the clamping signal is input;
the signal receiving module is configured to receive an interference signal and output a control signal according to the interference signal; and
and the feedback module is respectively connected with the touch detection module and the signal receiving module and is configured to output the clamping signal when the control signal is input.
In one embodiment, the touch detection module comprises a detection component and a touch component;
the touch component is configured to receive a touch instruction and change an output capacitance signal according to the touch instruction;
the detection component is connected with the touch component, is configured to output a key signal according to the capacitance signal, and stops outputting the key signal when the clamping signal is input.
In one embodiment, the touch assembly includes a touch electrode;
the touch end of the touch electrode is connected to the touch instruction input end of the touch assembly, and the output end of the touch electrode is connected to the capacitance signal output end of the touch assembly.
In one embodiment, the detection component includes a touch chip, a first resistor, a second resistor, a first capacitor, and a second capacitor;
the output end of the touch chip is connected with the first end of the first resistor, the touch detection end of the touch chip, the first end of the second resistor and the first end of the second capacitor are connected together, the power supply end of the touch chip is connected with the first end of the first capacitor and connected with a power supply, the grounding end of the touch chip, the second end of the first capacitor and the second end of the second capacitor are all connected with a power ground, the second end of the first resistor is connected to the key signal output end of the detection assembly and the clamping signal input end of the detection assembly, and the second end of the second resistor is connected to the capacitance signal input end of the detection assembly.
In one embodiment, the signal receiving module includes an antenna, an input end of the antenna is connected to an interference signal receiving end of the signal receiving module, and an output end of the antenna is connected to a control signal output end of the signal receiving module.
In one embodiment, the feedback module includes a third resistor, a fourth resistor and a field effect transistor;
the first end of the third resistor is connected to the control signal input end of the feedback module, the second end of the third resistor, the first end of the fourth resistor and the base of the field-effect tube are connected in common, the second end of the fourth resistor and the emitter of the field-effect tube are connected with a power ground, and the collector of the field-effect tube is connected to the clamping signal output end of the feedback module.
In one embodiment, the antenna is a serpentine antenna.
A second aspect of the present application provides a touch device, including the touch circuit according to any one of the first aspect.
A third aspect of the present application provides a touch device, including a device body and the touch circuit according to any one of the first aspect;
the device body is connected with the touch circuit and is configured to enter a wake-up state according to the key signal.
In one embodiment, the device body is an electronic door lock.
Compared with the prior art, the embodiment of the utility model has the following beneficial effects: when the environment where the touch detection module is located has an interference signal, the signal receiving module receives the interference signal and outputs a control signal to the feedback module according to the interference signal, and the feedback module outputs a clamping signal to the touch detection module when the control signal is input, so that the touch detection module stops outputting a key signal when the clamping signal is input, and therefore when the environment where the touch detection module is located has the interference signal, the touch detection module cannot output the key signal due to the influence of the interference signal, and the probability that the touch circuit is triggered by mistake is reduced.
Drawings
Fig. 1 is a first exemplary functional block diagram of a touch circuit provided in an embodiment of the present application;
fig. 2 is a schematic block diagram of a second example of a touch circuit provided in an embodiment of the present application;
fig. 3 is a schematic circuit diagram of an example of a touch circuit provided in an embodiment of the present application;
fig. 4 is an exemplary functional block diagram of a touch device according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, an embodiment of the present application provides a touch circuit, which includes a touch detection module 100, a signal receiving module 200, and a feedback module 300.
The touch detection module 100 is configured to stop outputting the key signal when the clamp signal is input.
The signal receiving module 200 is configured to receive an interference signal and output a control signal according to the interference signal.
And a feedback module 300 connected to the touch detection module 100 and the signal receiving module 200, respectively, and configured to output a clamp signal when a control signal is input.
When there is an interference signal in the environment, the interference signal may cause the touch detection module 100 to malfunction, so as to output a key signal.
In this embodiment, when there is an interference signal in the environment where the touch detection module 100 is located, the signal receiving module 200 receives the interference signal and outputs a control signal to the feedback module 300 according to the interference signal. The feedback module 300 outputs a clamp signal to the touch detection module 100 when the control signal is input, so that the touch detection module 100 stops outputting the key signal when the clamp signal is input. Therefore, when the environment where the touch circuit is located has an interference signal, the touch detection module 100 does not output a key signal due to the influence of the interference signal, thereby reducing the probability of the touch circuit being triggered by mistake.
Wherein the interference signal is a signal generated by a tesla coil.
Referring to fig. 2, in an embodiment, the touch detection module 100 includes a detection component 120 and a touch component 110.
The touch component 110 is configured to receive a touch instruction and change the output capacitance signal according to the touch instruction.
The detection element 120 is connected to the touch element 110, and configured to output a key signal according to the capacitance signal and stop outputting the key signal when the clamping signal is input.
In the present embodiment, when the touch element 110 is touched (receives a touch command), the capacitance signal output to the detection element 120 is changed, and when the capacitance signal is changed, the detection element 120 determines that the touch element 110 is touched and outputs a key signal. When the touch component 110 changes the output capacitance signal due to the interference signal, the interference signal outputs the clamp signal to the detection component 120 through the signal receiving module 200 and the feedback module 300, so that the detection component 120 does not output the key signal, thereby effectively avoiding the occurrence of malfunction of the detection component 120 due to the change of the capacitance signal output by the touch component 110 caused by the interference signal.
Referring to fig. 3, in one embodiment, the touch assembly 110 includes a touch electrode K1.
The touch end of the touch electrode K1 is connected to the touch command input end of the touch assembly 110, and the output end of the touch electrode K1 is connected to the capacitance signal output end of the touch assembly 110.
Referring to fig. 3, in an embodiment, the detecting assembly 120 includes a touch chip U1, a first resistor R1, a second resistor R2, a first capacitor and a second capacitor.
An output end OC of the touch chip U1 is connected to a first end of the first resistor R1, a touch detection end TCH of the touch chip U1, a first end of the second resistor R2 and a first end of the second capacitor are connected in common, a power end VDD of the touch chip U1 is connected to the first end of the first capacitor and to a power supply, a ground end GND of the touch chip U1, a second end of the first capacitor and a second end of the second capacitor are connected to a power ground, a second end of the first resistor R1 is connected to a key signal output end of the detection component 120 and a clamp signal input end of the detection component 120, and a second end of the second resistor R2 is connected to a capacitor signal input end of the detection component 120.
Referring to fig. 3, in an embodiment, the signal receiving module 200 includes an antenna ANT1, an input terminal of the antenna ANT1 is connected to an interference signal receiving terminal of the signal receiving module 200, and an output terminal of the antenna ANT1 is connected to a control signal output terminal of the signal receiving module 200.
Referring to fig. 3, in an embodiment, the feedback module 300 includes a third resistor R3, a fourth resistor R4, and a fet Q1.
A first end of the third resistor R3 is connected to the control signal input end of the feedback module 300, a second end of the third resistor R3, a first end of the fourth resistor R4 and the base of the field-effect transistor Q1 are connected in common, a second end of the fourth resistor R4 and the emitter of the field-effect transistor Q1 are both connected to the power ground, and the collector of the field-effect transistor Q1 is connected to the clamping signal output end of the feedback module 300.
The touch circuit shown in fig. 3 is described below with reference to the working principle:
when no interference signal exists in the environment, the field effect transistor Q1 is cut off because the base of the field effect transistor Q1 is connected with the power ground through the fourth resistor R4. When the touch electrode K1 is touched, the capacitance value of the touch electrode K1 changes, so that the capacitance signal input by the touch electrode K1 to the touch detection terminal TCH of the touch chip U1 changes. When the capacitance signal of the touch detection terminal TCH of the touch chip U1 changes, the output terminal OC of the touch chip U1 outputs a high level and outputs the high level as a key signal through the first resistor R1, and at this time, the node voltage signal TP externally output by the touch circuit is the key signal of the high level.
When an interference signal exists in the environment, the capacitance value of the touch electrode K1 changes due to the influence of the interference signal of the environment, at this time, the capacitance signal input to the touch detection terminal TCH of the touch chip U1 by the touch electrode K1 changes, and the output terminal OC of the touch chip U1 outputs a high level. Meanwhile, the antenna ANT1 receives an interference signal, converts the interference signal into a control signal and outputs the control signal to the base of the field effect transistor Q1, so that the field effect transistor Q1 is turned on, and the output terminal OC of the touch chip U1 is connected with the power ground through the first resistor R1 and the field effect transistor Q1. The ground potential of the power ground clamps the high level of the first resistor R1 applied to the touch chip U1, and pulls the high level down to the low level, so that the second end of the first resistor R1 is at the low level, and therefore the touch circuit does not output a high-level key signal to the outside, and at this time, the node voltage signal TP output to the outside by the touch circuit is a low-level ground potential signal.
In one embodiment, antenna ANT1 is a serpentine antenna.
The present invention further provides a touch device, which includes the touch circuit of any of the above embodiments, and because the touch device of the present embodiment includes the touch circuit of any of the above embodiments, the touch device of the present embodiment at least includes the beneficial effects corresponding to the touch circuit of any of the above embodiments.
Referring to fig. 4, an embodiment of the present application further provides a touch device, which includes a device body 400 and the touch circuit of any of the above embodiments, because the touch device of the present embodiment includes the touch circuit of any of the above embodiments, the touch device of the present embodiment at least includes the beneficial effects corresponding to the touch circuit of any of the above embodiments.
The device body 400 is connected to the touch circuit and configured to enter a wake-up state according to the key signal.
In this embodiment, the touch circuit outputs a key signal to the device body 400 when a touch instruction is input, so that the device body 400 performs an awake state after the key signal is input, thereby enabling the device body 400 to perform a work in the awake state. Meanwhile, the touch circuit does not output a key signal to the device body 400 under the influence of the interference signal, so that the device body 400 is not awakened due to the interference signal, the problem that power consumption is increased due to abnormal awakening of the device body 400 is avoided, and the effective service life of a battery for supplying power to the device body 400 is prolonged.
The device body 400 is an electronic device that has a standby state and an operating state and can be awakened according to a key signal. The device body 400 may be an electronic watch, a display screen, a mobile terminal, or the like.
In one embodiment, the device body 400 is an electronic door lock.
In this embodiment, because the electronic door lock will lose efficacy under the condition that the battery does not have electricity, the electronic door lock can not normally work when losing efficacy, so this embodiment reduces the probability of the electronic door lock losing electricity and losing efficacy by avoiding the condition that the effective use time of the battery is shortened due to abnormal awakening of the electronic door lock, and further improves the safety of the electronic door lock.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A touch circuit, comprising:
the touch detection module is configured to stop outputting the key signal when the clamping signal is input;
the signal receiving module is configured to receive an interference signal and output a control signal according to the interference signal; and
and the feedback module is respectively connected with the touch detection module and the signal receiving module and is configured to output the clamping signal when the control signal is input.
2. The touch circuit of claim 1, wherein the touch detection module comprises a detection component and a touch component;
the touch component is configured to receive a touch instruction and change an output capacitance signal according to the touch instruction;
the detection component is connected with the touch component, is configured to output a key signal according to the capacitance signal, and stops outputting the key signal when the clamping signal is input.
3. The touch circuit of claim 2, wherein the touch component comprises a touch electrode;
the touch end of the touch electrode is connected to the touch instruction input end of the touch assembly, and the output end of the touch electrode is connected to the capacitance signal output end of the touch assembly.
4. The touch circuit of claim 2, wherein the detection component comprises a touch chip, a first resistor, a second resistor, a first capacitor, and a second capacitor;
the output end of the touch chip is connected with the first end of the first resistor, the touch detection end of the touch chip, the first end of the second resistor and the first end of the second capacitor are connected together, the power supply end of the touch chip is connected with the first end of the first capacitor and connected with a power supply, the grounding end of the touch chip, the second end of the first capacitor and the second end of the second capacitor are all connected with a power ground, the second end of the first resistor is connected to the key signal output end of the detection assembly and the clamping signal input end of the detection assembly, and the second end of the second resistor is connected to the capacitance signal input end of the detection assembly.
5. The touch circuit of claim 1, wherein the signal receiving module comprises an antenna, an input terminal of the antenna is connected to an interference signal receiving terminal of the signal receiving module, and an output terminal of the antenna is connected to a control signal output terminal of the signal receiving module.
6. The touch circuit of claim 1, wherein the feedback module comprises a third resistor, a fourth resistor, and a field effect transistor;
the first end of the third resistor is connected to the control signal input end of the feedback module, the second end of the third resistor, the first end of the fourth resistor and the base of the field-effect tube are connected in common, the second end of the fourth resistor and the emitter of the field-effect tube are connected with a power ground, and the collector of the field-effect tube is connected to the clamping signal output end of the feedback module.
7. The touch circuit of claim 5, wherein the antenna is a serpentine antenna.
8. A touch device comprising the touch circuit according to any one of claims 1 to 7.
9. A touch device comprising a device body and the touch circuit according to any one of claims 1 to 7;
the device body is connected with the touch circuit and is configured to enter a wake-up state according to the key signal.
10. The touch device of claim 9, wherein the device body is an electronic door lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121204113.5U CN215956364U (en) | 2021-05-27 | 2021-05-27 | Touch circuit, touch device and touch equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121204113.5U CN215956364U (en) | 2021-05-27 | 2021-05-27 | Touch circuit, touch device and touch equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215956364U true CN215956364U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121204113.5U Active CN215956364U (en) | 2021-05-27 | 2021-05-27 | Touch circuit, touch device and touch equipment |
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| Country | Link |
|---|---|
| CN (1) | CN215956364U (en) |
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2021
- 2021-05-27 CN CN202121204113.5U patent/CN215956364U/en active Active
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